Attachment for paper-machine driers



J. w. SMITH.

ATTACHMENT FOR PAPER MAQHINEDRIERS. APPLICATION FILED MAR, 1 9, 1921.

1,420,454, PatentedJune 20, 1922.

WITNESSES v INVE/VTUB IE1 (JOHN W JM/TH nrromvsys J0EE WILLIAM SMITH, OF WEST CARTHAGE, NEW YORK.

ATTACHMENT FOR PAPER-MACHINE DRIERS.

ma am.

Specification of Letters Patent; Patented neg 2Q 1922 Application filed March 19, 1921. Serial No. 453,653.

To all whom it may concern: I

Be it known that I, JOHN W. SMITH, a citizen of the United States, and a resident of West Carthage, in the county of Jefferson and State of New York, have invented a new and Improved Attachment for Paper- Machine Driers, of which the following is a description;

My invention relates to the attachment provided on paper-machine driers for afi'ording a steam inlet to the drier and an outlet from the drier for condensed moisture. The invention is applicable to any style of drier both of the dipper type and the stationary siphon type. Attachments of the character referred to as employed in practice result in an equalizationiof pressure'in the steam inlet and moisture outlet of the attachment which materially works against economy, in involving a great Waste of steam and because it results in reducing the efiiciency of the drier owing to the water of condensation not being properly drained from the drier.

The general object of the invention is to provide a drier to overcome the defects referred to by avoiding the present Waste of steam and by increasing the efficiency of the drier by isolating from the steam inlet, the

outlet of the return pipe and preventing equalization of pressure. 1

More specifically I have for an object to provide a practical embodiment of the invention that will preserve to the maximum extent the desirable elementsand features of the attachments universally employed for the stated purpose.

The distinctive features and advantages of the invention will more clearly appear as the description proceeds.

Reference is to be had to the accompanying drawings forming a part of this specification, it being understood that the drawings are merely illustrative of one example of the invention.

,Figure 1 is a longitudinal vertical section of a drier attachment embodying my invention;

Figure 2 is a front end view of my attachment;

Figure 3 is a bottom plan view thereof.

In the illustrated example of my invention the usual sleeve 10 is employed having a flange 11'for securing the attachment to a drier (not shown) at the steam inlet thereof.

The numeral 12 indicates the usual sectional clamp collar on the sleeve 10, said collar being secured by bolts 13 to side-flanges 14 on the fitting 15 through which the steam is admitted and through which the return pipe as hereinafter explained, extends. A ball and socket joint is formed by a cupped formation 16 on fitting 15 and a correspondlng ball formation on an element 17 interposed between the fitting 15 and the sleeve 10 as is customary in attachments of-the type to which the invention relates. The character 13 indicates the usual springs provided on the bolts 13 to maintain close contact at the joints between the fitting 15 and the collar 12. The numeral 18 indicates the. usualoil cups for lubricating the joint at the opposite faces of the element 16.

With the described construction the fitting 15 and collar 12 are fixed while the sleeve 10 may revolve with the drier in accordance with the usual practice. i

The fitting 15 is provided internally with a steam chamber 19 to which a steam inlet pipe 20 leads. A short steam pipe 21 extends from the steam chamber 19 forwardly pastthe joints between the fitting 15 and sleeve 10 and into the latter to direct steam to the drier inlet through said sleeve, said pipe in practice having threaded engagement as usual with the fitting 15.

p The moisture return pipe 22 which leads from the drier extends as usual through the sleeve 10 and steam pipe 21 concentric with and spaced from the latter for the forward passage of the steam in a customary manner to the inlet of the drier outside of said pipe 22. In accordance with my invention. means is provided to establish complete independence between the-outlet 2 2 and the steam chamber 19 for which purpose in the illustrated example, 'use is made of a packing gland 23 in the rear end of the fitting 15, said pipe 22 extending through the packing gland to a point of discharge. The pipe may deliver to a fixed elbow 25 through a packing gland 24 thereon, said elbow having an outlet pipe 26.

I thus provide a steam inlet entirely independent of and out of communication with the return pipe 22, thereby utilizing the steam at its highest efficiency and with the maximum economy, leaving; the steam inlet and the moisture return to function unaffected one by the other, the avoidance of a balancing of pressures making for increased eficiency in the action of the return pipe in draining-the condensed moisture from the drier.

I would state in conclusion that while the illustrated example constitutes'a practical embodiment of my inventi0n,l do not limit myself strictly to the mechanical details herein illustrated, since manifestly the same can be considerably varied without departure from the spirit of the invention as defined in the appended claims.

' Having thus described my invention, 1 claim:

1. An attachment of the class described including an element adapted to be attached to a drier to revolve therewith, a fixed fitting affording a steam passage to said element, a moisture return pipe extending through said element and through said fit- 1 ,aa wa ting to a point beyond the end of saidfitting, and means establishing a fluid-tight joint between the return pipe and the'fittirig, said return. pipe at the end beyond the fitting being adapted to connect with a discharge pipe.

2. An attachment of the. class described including a sleeve adapted to be secured to a drier at the inlet thereof, a fitting relatively to which said sleeve may revolve, said fitting having a steam chamber and a steam inlet leading thereto, a stuffing box on said fitting rearward of the steam chamber, and a moisture return pipe extending through said sleeve, and through said steam chamber and stuffing box.

JoHN WILLIAM SMITH, 

